Power drive for reciprocating well pumps



Nov. 12, 1957 D. C. REED POWER DRIVE FOR RECIPROCATING WELL PUMPS Filed Dec. 6, 1955 David C. Reed INVENTOR.

2,812,722 Patented Nov. 12, 1957 POWER DRIVE FOR RECIPROCATING WELL PUMPS David C. Reed, Marshall, Ill. Application December 6, 1955, Serial No. 551,311 1 Claim. (Cl. 103-205) This invention relates generally to vertically reciprocated pump assemblies and is more particularly concerned with a novel improved pump jack or power-driven pump assembly for reciprocating the pump plunger rod of an ordinary water pump.

A primary object of this invention is to provide a power transfer case on an upper mounting flange of a pump housing whereby said power transfer case is operatively connected to the reciprocating rod of an ordinary water pump through pitman means and whereby said transfer case supports power means thereon operatively connected to power transfer means in said transfer case.

A further object of the invention in conformance with that set forth above is to provide a conversion attachment for ordinary water pumps which is readily and economically manufactured, easily maintained and installed, and relatively safe and acceptable for the purpose intended.

It will be noted that the power driven pump assembly is relatively small and compact being supported in an elevated position out of the reach of small children, and presents the minimum of exposed moving parts.

These together with other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure 1 is a front elevational view of the novel power driven pump assembly with portions broken away for clarity;

Figure 2 is a side elevational view of Figure 1 looking from left to right at Figure 1; and

Figure 3 is an enlarged sectional view taken substantially on the line 3-3 of Figure l.

The power driven pump assembly is indicated generally at and includes a pump housing 12 and a power drive or pump jack assembly 14.

The pump housing 12 is of a conventional character having a lower mounting flange portion 16 suitably secured by means of fastening elements 18 to a support surface 20. The housing 12 includes a conventional outlet portion or spout 22 and has extending therethrough a vertically reciprocating pump rod 24, the heretofore described structure relative to the pump housing being of a conventional character and constituting that involved in conventional water pumps. The housing 12 includes a horizontally disposed mounting flange 26 having suitably secured thereon by means of suitable fastening elements 28 a vertically extending power transfer case 30 which extends vertically from the mounting flange 26 in offset relation to the longitudinal axis of the housing 12.

The power transfer case 30 includes a lower upstanding support portion 32 terminating at its upper end in a cylindrical upright chamber portion 34 having a horizontal axis, said chamber portion 34 including a surmounting extension chamber portion 36 for a purpose to be subsequently described.

A first support shaft 38 extends through the cylindrical portion 34 of the casing, being journaled therein in any suitable manner, see Figure 3, and has an outwardlyextending end portion 40 fixedly secured to one end 42 of a crank arm 44 in any suitable manner, said crank arm 44 terminating in a laterally extending pivot portion 46. The pivot portion 46 of the crank arm is pivotally connected to a suitable sleeve portion 48 of a pitman rod 50, the other end of thepitman rod being threadedat 52 and having secured thereon an adjustablesleeve 54 terminating in a pivotal ear portion 56. The upper end of the pump rod 24 is threaded at 58 and has secured thereon a suitable sleeve element 60 terminating in a pivotal connecting ear 62, the ear portions 56 and 62 being pivotally connected by means of a suitable pivot pin element 64. Thus rotation of the support shaft 38 results in reciprocation of the pitman rod 50 and reciprocal movement of the pump rod 24 for the purpose of raising water to be dispensed from the spent 22.

The mounting flange 26 of the pump housing has secured thereon a laterally extending support portion 66 supporting a vertical support element 68 which is substantially parallel to the longitudinal axis of the pump housing and which has pivotally connected on a horizontal pivot pin element 70 a guide lever 72, the other end of the guide lever 72 including a longitudinally disposed lost motion slot portion 74 through which the pivot pin 64 extends. The guide lever 72 aids in maintaining the pump rod in a single plane of movement when the same is being reciprocated by the pitman 50.

The support shaft 38 has suitably secured thereon a Worm gear-wheel 76 which is in peripheral engagement with a worm gear 78, said worm gear 78 being fixedly secured on a second support shaft 80 extending through the extension chamber portion 36 of the transfer case and being journaled therein, the longitudinal axis of the shaft 80 being in substantial planar alignment with the axis of rotation of the worm gear-wheel 76.

The extension chamber portion 36 incorporates a horizontal mounting flange portion 82 through which extend conventional fastening elements 84 for securing thereon power means, such as the electric motor indicated at 86.

The power means or electric motor 86 includes a power output shaft 88 substantially parallel to the second support shaft 80, these shafts 80 and 88 having mounted thereon in planar alignment pulley elements 90 and 92, respectively, over which is journaled a drive belt 94.

Although an electric motor has been disclosed as the power means it is readily apparent that an internal combustion engine may be substituted therefor.

Various positional directional terms such as front, rear, etc. are utilized here and have only a relative connotation to aid in describing the device and are not intended to require any particular orientation with respect to any external elements.

The foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes willreadily occur to those skilled in the art, it is not desired to limit the: invention to the exact construction and operation shown and described, and accordingly all suitable modifications and equivalents may be resorted to, falling within the scope of the invention as claimed.

What is claimed as new is as follows:

A power drive attachment for a pump having a pump housing and a pump rod extending upwardly out of the same, said drive comprising an upstanding support portion, an upright cylindrical chamber surmounting said support portion and having a horizontal axis, an extension casingisurmountingv said chamber and supporting a motor cylindrical chamber and having a worm Wheel fastened thereon in said chamber and a terminal crank outside said chambena worrnjournaled in-saidcasing aboveand in: mesh with said worm wheel andito which said'motor is:

operatively connected, a pitman: depending from said crank, a basefiflange on said supporttportion attached onv topof thepurnphousing and offsetting saidisupport por tion and ,casinglateraily of the pump housing to dispose said pitrnan in acommon'planewith the pump rod, 21 pair of pivoted; together sleevesonegthreaded onsaid pitman and the other thleadable, on said pump rod tooperatively connectthe pitman to the pump rod, and 3:810tt6d guide leyer-t vertically pivotally, mounted on. said flange and guiding-thepivotofsaid sleeves in its slot'and adapted 4v to maintain the pitman and plunger rod in a common plane.

References Cited in the file of this patent 5 UNITED STATES PATENTS 1,751,474 Eager Mar. 25, 1930 2,213,927 Gracey Sept. 3, 1940 2,226,461 Crull Dec. 24, 1940 10 2,382,080 Lowry Aug. 14; 1945 2,573,753 Young Nov. 6, 1951 2,573,948 Bernard Nov. 6, 1951 2,591,951 Lowry Apr.i8, 1952 2,691,941' Barklow Oct. 19, 1954 '15 2,702,510 Dourte Feb. 22, 1955 2,727,469 Pinkerton Dec. 20, 1955 

